If faced with a crazed gunman:
1. Run briskly to a "Gun Free Zone." This way the attacker will not be able to use his gun because guns are not allowed in a "Gun Free Zone."
2. If this does not work, forcefully point to the sign to make the crazed attacker realize he is in a "Gun Free Zone."
3. If this doesn't work, shout really loudly, "Did you not see the sign?" Hopefully this will cause the madman to comply and not kill you.
4. If this does not work (and you're still alive) leave the "Gun Free Zone" and proceed to whatever place has the most legally armed good guys with guns and pray that it's not too late to save your life.
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Wow, 27 killed, most of them kids, and someone actually tried to write a "tongue in cheek"
response on what to do? Truly tasteless.